to buy tickets for the biggest jackpot ever is in full swing, including georgia and florida, the first two states to allow hopefuls to buy online. now imagine it, you just won the $425 million. you've never felt better in your life, right? wrong. >> butterflies in your stomach wouldn't even begin to describe how your stomach feels. so your ability for memory, decision making, rationale thinking is kind of on the decline. some people say even i.q. can drop, sometimes as much as 20%. >> reporter: experts say the first thing to do, turn the ticket over and find out how long you have to claim the dough. next, get a safe deposit box, put the ticket inside where it can't be lost or stolen. get a new cell phone number and put the home phone on voice mail. then hire professionals who specialize in financial windfalls. >> even if you say, money won't change me, i like my life, it will. >> reporter: not always for the better. the jackpot club is littered with casualties. too many to list. jack whitaker, the winner of what was, in 2002, the largest payout in history, saw his life consumed by hard